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Association between hypertension and 24-h urine composition in adults without urolithiasis in China. World J Urol 2020; 39:589-595. [PMID: 32253577 DOI: 10.1007/s00345-020-03189-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Accepted: 03/27/2020] [Indexed: 10/24/2022] Open
Abstract
PURPOSE To explore the association between hypertension and 24-h urine composition in adults without urolithiasis in China. MATERIALS AND METHODS Blood test and 24-h urine analysis were performed on 958 non-stone formers in six cities to select eligible participants. Eligible participants were divided into hypertension group and non-hypertension group according to WHO guidelines. The 24-h urine compositions between two groups were compared using univariate and multivariate logistic regressions. RESULTS A total of 584 adults without urolithiasis were included in this analysis. Compared with non-hypertension group, hypertension group had significantly older age, higher BMI, higher prevalence of diabetes mellitus and higher levels of total cholesterol and LDL, but lower eCCr value, lower levels of serum creatinine and serum sodium (all P value < 0.05). In univariable comparisons, hypertension patients had significantly higher level of urine potassium (mean difference [MD] = - 3.89 mmol, 95% confidence interval [CI] - 7.37 to - 0.42, P = 0.014) but lower levels of urine creatinine (MD = 0.80 mmol, 95% CI 0.21-1.39, P = 0.004) and pH (MD = 0.12, 95% CI - 0.01 to 0.25, P = 0.033) than non-hypertension adults. However, no significant difference was found in all 24-h urinary components between two groups (all P value > 0.05) in multivariate Logistic regression analyses. CONCLUSIONS Our study demonstrated that hypertension did not independently influence the 24-h urine composition in adults without urolithiasis in China; however, we cannot make such an arbitrary conclusion that hypertension was not a risk factor for urolithiasis.
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Deng T, Mai Z, Cai C, Duan X, Zhu W, Zhang T, Wu W, Zeng G. Influence of weight status on 24-hour urine composition in adults without urolithiasis: A nationwide study based on a Chinese Han population. PLoS One 2017; 12:e0184655. [PMID: 28886192 PMCID: PMC5591005 DOI: 10.1371/journal.pone.0184655] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2017] [Accepted: 08/28/2017] [Indexed: 01/08/2023] Open
Abstract
Objectives This study sought to explore the influence of different body weight statuses on 24-hour urine compositions in adults without urolithiasis based on a nationwide study of a Chinese Han population. Material and methods Twenty-four-hour urine samples from 584 Chinese Han adults without urolithiasis in six cities were analyzed. The participants were divided into four body weight status types according to their body mass indices (BMIs) according to WHO guidelines. The baseline characteristics and 24-hour urine compositions of the standard weight group were compared with those of the underweight, overweight and obese groups. The influences of different body weight statuses on the 24-hour urine compositions were explored using univariate and multivariate logistic regressions. Results The numbers of participants in the underweight, standard weight, overweight and obese status groups were 24, 376, 149 and 35, respectively. The overweight and obese groups suffered significantly higher risks of hypertension and diabetes mellitus than the standard weight group. In the univariate analyses, compared with the standard weight group, the overweight group had significantly higher levels of urine citrate (mean difference [MD] = 0.51 mmol, 95% confidence interval [CI]: 0.15–0.87, P = 0.001), potassium (MD = 6.63 mmol, 95% CI: 1.13–12.14, P = 0.01) and magnesium (MD = 0.38 mmol, 95% CI: 0.08–0.69, P = 0.014). Significant increases in urine citrate (MD = 0.85 mmol, 95% CI: 0.01–1.68, P = 0.046), magnesium (MD = 0.69 mmol, 95% CI: 0.13–1.25, P = 0.016) and phosphate (MD = 2.28 mmol, 95% CI: 0.03–4.54, P = 0.047) were found in the obese group. No significant differences were detected between the standard weight and underweight groups. In the multivariate logistic regression analyses, we only observed significantly higher levels of urine potassium (odds ratio [OR] = 1.02, 95% CI: 1.00–1.04, P = 0.03) in the overweight group and phosphate (OR = 1.32, 95% CI: 1.05–1.66, P = 0.018) in the obese group when compared with the standard weight group. Conclusions Nonstone-forming adults with overweight or obese statuses were at higher risks of hypertension and diabetes mellitus. Obese nonstone-formers might have a greater risk of urinary stone formation due to increased urinary phosphate excretion. Additionally, underweight status had no influence on 24-hour urine composition.
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Affiliation(s)
- Tuo Deng
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Zanlin Mai
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Chao Cai
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Xiaolu Duan
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Wei Zhu
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Tao Zhang
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Wenqi Wu
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
| | - Guohua Zeng
- Department of Urology, Minimally Invasive Surgery Center, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- Guangzhou Institute of Urology, Guangzhou, China
- Guangdong Key Laboratory of Urology, Guangzhou, China
- * E-mail:
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Farmanesh S, Alamani BG, Rimer JD. Identifying alkali metal inhibitors of crystal growth: a selection criterion based on ion pair hydration energy. Chem Commun (Camb) 2015; 51:13964-7. [DOI: 10.1039/c5cc04361a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We show that alkali metals function as effective modifiers of calcium oxalate monohydrate (COM) crystallization wherein alkali-oxalate ion parings reduce the rate of crystal growth by as much as 60%.
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Affiliation(s)
- Sahar Farmanesh
- University of Houston
- Department of Chemical and Biomolecular Engineering
- Houston
- USA
| | - Bryan G. Alamani
- University of Houston
- Department of Chemical and Biomolecular Engineering
- Houston
- USA
| | - Jeffrey D. Rimer
- University of Houston
- Department of Chemical and Biomolecular Engineering
- Houston
- USA
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Bartges JW, Kirk CA, Cox SK, Moyers TD. Influence of acidifying or alkalinizing diets on bone mineral density and urine relative supersaturation with calcium oxalate and struvite in healthy cats. Am J Vet Res 2014; 74:1347-52. [PMID: 24066920 DOI: 10.2460/ajvr.74.10.1347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To evaluate the influence of acidifying or alkalinizing diets on bone mineral density and urine relative supersaturation (URSS) with calcium oxalate and struvite in healthy cats. ANIMALS 6 castrated male and 6 spayed female cats. PROCEDURES 3 groups of 4 cats each were fed diets for 12 months that differed only in acidifying or alkalinizing properties (alkalinizing, neutral, and acidifying). Body composition was estimated by use of dual energy x-ray absorptiometry, and 48-hour urine samples were collected for URSS determination. RESULTS Urine pH differed significantly among diet groups, with the lowest urine pH values in the acidifying diet group and the highest values in the alkalinizing diet group. Differences were not observed in other variables except urinary ammonia excretion, which was significantly higher in the neutral diet group. Calcium oxalate URSS was highest in the acidifying diet group and lowest in the alkalinizing diet group; struvite URSS was not different among groups. Diet was not significantly associated with bone mineral content or density. CONCLUSIONS AND CLINICAL RELEVANCE Urinary undersaturation with calcium oxalate was achieved by inducing alkaluria. Feeding an alkalinizing diet was not associated with URSS with struvite. Bone mineral density and calcium content were not adversely affected by diet; therefore, release of calcium from bone caused by feeding an acidifying diet may not occur in healthy cats.
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Affiliation(s)
- Joseph W Bartges
- Department of Small Animal Clinical Sciences, College of Veterinary Medicine, University of Tennessee, Knoxville, TN 37996
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Bishop JM, Lee HW, Handlogten ME, Han KH, Verlander JW, Weiner ID. Intercalated cell-specific Rh B glycoprotein deletion diminishes renal ammonia excretion response to hypokalemia. Am J Physiol Renal Physiol 2013; 304:F422-31. [PMID: 23220726 PMCID: PMC3566498 DOI: 10.1152/ajprenal.00301.2012] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2012] [Accepted: 12/04/2012] [Indexed: 11/22/2022] Open
Abstract
The ammonia transporter family member, Rh B Glycoprotein (Rhbg), is an ammonia-specific transporter heavily expressed in the kidney and is necessary for the normal increase in ammonia excretion in response to metabolic acidosis. Hypokalemia is a common clinical condition in which there is increased renal ammonia excretion despite the absence of metabolic acidosis. The purpose of this study was to examine Rhbg's role in this response through the use of mice with intercalated cell-specific Rhbg deletion (IC-Rhbg-KO). Hypokalemia induced by feeding a K(+)-free diet increased urinary ammonia excretion significantly. In mice with intact Rhbg expression, hypokalemia increased Rhbg protein expression in intercalated cells in the cortical collecting duct (CCD) and in the outer medullary collecting duct (OMCD). Deletion of Rhbg from intercalated cells inhibited hypokalemia-induced changes in urinary total ammonia excretion significantly and completely prevented hypokalemia-induced increases in urinary ammonia concentration, but did not alter urinary pH. We conclude that hypokalemia increases Rhbg expression in intercalated cells in the cortex and outer medulla and that intercalated cell Rhbg expression is necessary for the normal increase in renal ammonia excretion in response to hypokalemia.
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Affiliation(s)
- Jesse M Bishop
- Division of Nephrology, Hypertension, and Transplantation, University of Florida College of Medicine, Gainesville, FL 32610, USA
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Abstract
Nephrolithias is a common problem in populations around the world, and contribute significantly to the development of end stage renal disease. It is a matter of debate whether the metabolic factors responsible for renal stone formation are similar or variable in different populations around the globe. This review discusses the influence of different metabolic and dietary factor, and some other co-morbid conditions on the etiopathogenesis Nephrolithiasis. Evaluation and medical management of Nephrolithiasis is summarized in the later part of the article.
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Affiliation(s)
- Salam Ranabir
- Department of Medicine, Regional Institute of Medical Sciences, Imphal, Manipur, India
| | - Manash P. Baruah
- Department of Endocrinology, Excel Center, Guwahati, Assam, India
| | - K. Reetu Devi
- Department of Physiology, Jawaharlal Nehru Institute of Medical Sciences, Imphal, Manipur, India
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Abstract
Nephrolithiasis is a highly prevalent condition with a high recurrence rate that has a large impact on the quality of life of those affected. It also poses a great financial burden on society. There have been great advancements in the surgical treatment of stone disease over the past several decades. The evolution of surgical technique appears to have overshadowed the importance of prevention of stone disease despite evidence showing medical therapies significantly decreasing stone recurrence rates. Herein we review the metabolic evaluation of stone formers with the use of specific blood and urine tests. We complete our discussion with a review of the medical management of stone formers providing both general recommendations as well as reviewing focused therapies for specific metabolic abnormalities and medical conditions.
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Affiliation(s)
- Michelle Jo Semins
- The James Buchanan Brady Urological Institute, The Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
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Boonla C, Krieglstein K, Bovornpadungkitti S, Strutz F, Spittau B, Predanon C, Tosukhowong P. Fibrosis and evidence for epithelial-mesenchymal transition in the kidneys of patients with staghorn calculi. BJU Int 2011; 108:1336-45. [PMID: 21410631 DOI: 10.1111/j.1464-410x.2010.10074.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
OBJECTIVES • To quantify fibrotic lesions in renal tissues obtained from patients with large calculi and to evaluate association with renal function. • Presence of epithelial-mesenchymal transition (EMT) in stone-containing renal tissues was investigated. PATIENTS, SUBJECTS AND METHODS • In all, 50 patients with nephrolithiasis with large calculi and matched healthy controls (37) were recruited. • Plasma creatinine (Cr) and corrected Cr clearance (CCr) were determined in all subjects. • Of the 50 patients, 38 had renal tissue available for histological analysis. Fibrosis was assessed by Masson's trichrome staining. Co-expression of epithelial cytokeratins and mesenchymal markers [α-smooth muscle actin (αSMA) and vimentin] in renal tubular cells was detected by dual immunofluorescence staining. • Expression of fibronectin, transforming growth factor β₁ (TGF-β₁) and CD68 were investigated. RESULTS • Overall, the kidney function of the patients was significantly reduced, indicated by increased plasma Cr and decreased corrected CCr compared with healthy controls. • Inflammation grading in renal tissues of the patients was correlated with the percentage of the fibrotic area. Renal fibrosis was inversely correlated with renal function. • Cytokeratins co-expressed with αSMA and vimentin were found in nephrolithiatic renal tubular cells, and these cells strongly expressed fibronectin and TGF-β₁. • Infiltration of CD68-positive cells was a common finding in the inflamed renal sections. CONCLUSIONS • Kidneys of large stone-forming patients had robust signs of inflammation and fibrosis, and there was a close correlation of renal fibrosis with renal dysfunction. • This is the first study to show evidence for renal tubular cells showing signs of EMT in large stone-containing kidneys. Plausibly, TGF-β₁ triggers EMT, which at least in part contributes to large stone-induced renal fibrosis.
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Affiliation(s)
- Chanchai Boonla
- Department of Biochemistry, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
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